WaterQualityWatch -- Continuous Real-Time Water Quality of Surface Water in the United States

Real-Time Nitrate, in mg/L as N

Map of , showing which states provide real-time computed water-quality data
05537980 05543010 05559900 05568705 05587498 03338780 05420400 05576100 05553700 03339000 05586300 07020850 05554300 05447500 05595000 05465500 05567500 05446500 05576195 03612600 03378500 05599490 03346500 03381500 03336890 Explanation

* Site operated on a seasonal basis or currently is not operating.
No values are available for the last 6 hours.

The nitrate measurement is actually nitrate plus nitrite. Nitrite absorbs strongly at wavelengths similar to nitrate, and is not explicitly accounted for in the nitrate calculations by the sensors. For practical purposes, the concentration of nitrite is usually negligible in surface waters and has little effect on reported nitrate concentrations.

The "Real-time" map tracks short-term changes (over several hours) of water quality. Although the general appearance of the map changes very little from one hour to the next, individual sites may change rapidly in response to major rain events or to reservoir releases. The data used to produce this map are provisional.